| Analysis of the search query | why is atmospheric pressure less at high altitudes |
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Top competitors on query "why is atmospheric pressure less at high altitudes"
Effects of Pressure and Density Altitude on Aircraft Performance
http://www.experimentalaircraft.info/flight-planning/aircraft-performance-3.php Competition: low
For example, aircraft all up weight is something we can do about but air density depends on more factors, as we will see, and most of them we can not influence at all. International Standard Atmosphere A standard atmosphere has been established to enable comparison of aircraft performance, calibration of instruments (altimeters, transponders encoders, etc) and for meteorological purposes
ABC of oxygen: Oxygen at high altitude
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1114067/ Competition: low
This is because the decreased driving pressure for oxygen from alveolar gas into arterial blood is insufficient to fully oxygenate the blood as it passes through the pulmonary capillaries. The cause of acute mountain sickness is not understood but is clearly related to hypoxia and factors such as effort, air temperature, previous viral respiratory tract infection, and innate susceptibility
Barometric pressure sensor - Ford Diesel Power Forums
http://www.forddieselpower.com/forums/showthread.php?t=9712&showall=1 Competition: low
Also need to know if the Computer a DAC3 has a sensor in it and if so how do I disconnect the stand a lone sensor and short it so that the internal one is working properly. I need to know at what voltage should the bps be at at 500 feet above sea level, should it be in the negative or positive range of 12 volt dc I need to know if the DAC3 model computer has a built in bps and if so how do I disable the stand alone bps that this truck originally came with
http://uk.answers.yahoo.com/question/index?qid=20090226042701AA0oBC5 Competition: low
Obviously there are limits to how high and fast a particular aeroplane can go due to mach number (shockwave) effects or simply that the engine thrust becomes insufficient. The solution to the conflict is to fly high since this enables the airframe to fly at an optimum speed (EAS) whilst the engine is flying at high speed (TAS)
http://www.weathercasterapp.com/ Competition: low
Droughts slowly dry up the regions they affect and can last for years, making them one of top three threats to the human population (along with flooding and famine). This information is then fed into computer programs called Numerical Weather Prediction (NWP) Models which are a vital part in how weather forecasts are made
http://quickoneplus.com/fish/articles/page.asp?page=barometric Competition: low
His barometer used a glass tube from which all air has been removed (a vacuum) and is inserted into a container of mercury that is exposed to the pressure of the air. This is probably due to the fact that the pressure of water is so much greater in deeper waters making the air pressure above it no longer having any significance
High Altitude Canning
http://foodpreservation.about.com/od/Canning/a/High-Altitude-Canning.htm Competition: low
If you're using a pressure canner with a deadweight guage, the kind that shows 5-10-15 psig, increase the pressure to the 15 psig setting if you are more than 1000 feet above sea level. To adjust recipes for high altitude canning, start with these two basic concepts: For boiling water bath canning, add processing time at high altitudes
Why does altitude affect air temperature? - Curiosity
http://curiosity.discovery.com/question/why-altitude-affect-air-temperature Competition: low
But why on Earth does it have to be so cold up there? We all know that the higher you go, the colder it gets, but why? Altitude affects the temperature of the air because air pressure gets lower as the altitude increases. Finally, just for comparison's sake, if you think we're taking a crushing blow walking around at sea level under that 14.7 pounds per square inches of pressure, you might enjoy buying a telescope and training it on Venus
http://www.ehow.com/about_5063824_effects-barometric-pressure-body.html Competition: low
On average, the air presses against the body at 14.7 pounds per square inch; air inside the body balances out this force, preventing the body from being crushed under this weight. Discussing pressure and its effects on the body involves considering both direct results of pressure changes and weather variables that result from these changes
http://www.ehow.com/about_4597603_what-barometric-pressure.html Competition: low
Health Effects of High Barometric Pressure Barometric pressure, or atmospheric pressure, is the pressure exerted by the tiny molecules of air present in the atmosphere. How to Find the Barometric Pressure Barometric pressure data are widely available and include both current pressures and historic barometric pressure readings
Atmospheric Pressure
http://wn.com/atmospheric_pressure Competition: low
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. published: 01 Nov 2012 views: 1695 author: onlearningcurve rerelease Water Lift Atmospheric Pressure Torricelli Vacuum 10 meter potential Order: Reorder Duration: 2:43 Updated: 09 Aug 2013 This water is held in place with atmospheric pressure pushing on the surrounding pond water
Why do I change certain ingredients for high altitude cooking?
http://askville.amazon.com/change-ingredients-high-altitude-cooking/AnswerViewer.do?requestId=16713704 Competition: low
Answer from newfietom 3 people found this helpful It's all about the boiling point of water Having lived in Denver, CO, I've lived through high-altitude baking and there's nothing more frustrating than adjusting a recipe (baking) that you've known all your life only to end up with poor results anyway.... And if I remember my high school chemistry, then you are correct, that the less the air pressure, then the faster ( and lower the temp ) that will make water boil
http://www.wunderground.com/blog/weatherhistorian/world-and-us-anticyclonic-high-barometric-pressure-records Competition: low
Photographer unknown.When converting atmospheric pressure to mean sea level (in order to have homogeneous readings regardless of elevation) a formula is used to calculate such. and European high-pressure records see The Highest of the Highs: Extremes of Barometric Pressure in the British Isles by Stephen Burt, Weather magazine Vol
http://newton.dep.anl.gov/askasci/env99/env99406.htm Competition: low
Therefore it requires a lower temperature for water to boil at a higher altitude, and thus less time (not more), assuming that the amount of heat being used is the same as at sea level. Temperature sometimes increases with height from the surface upward a ways when a temperature inversion exists (resulting from cooling of the surface more rapidly than cooling of air above, as can happen on many nights)
atmospheric pressure - definition of atmospheric pressure by the Free Online Dictionary, Thesaurus and Encyclopedia.
http://www.thefreedictionary.com/atmospheric+pressure Competition: low
At sea level the atmospheric pressure is approximately 1 kilogram per square centimeter (14.7 pounds per square inch), which will cause a column of mercury in a mercury barometer to rise 760 millimeters (30.4 inches). Also called barometric pressure.A Closer Look The weight of the air mass, or atmosphere, that envelopes Earth exerts pressure on all points of the planet's surface
http://kids.earth.nasa.gov/archive/air_pressure/ Competition: low
Since you are breathing fewer molecules of oxygen, you need to breathe faster to bring the few molecules there are into your lungs to make up for the deficit. Do you think a decrease in temperature could be explained in terms of air pressure? How? Air Pressure Experiments 1.While holding your hand on your ribs, take a deep breath and observe what happens to your chest
Altitude - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Altitude Competition: low
Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance (feet or metres) instead of atmospheric pressure
http://www.challengers101.com/Pressure.html Competition: low
And, just as the creatures living at the bottom of the ocean are subjected to the pressure exerted on them by the water, we are subjected to the pressure exerted on us by the atmosphere. How much would the air in this tall, skinny column weigh? Remember the water in the tank above? Each square inch of bottom surface has to support the water above it
Why do airplanes fly in high altitudes even when the oxygen level there is less? - Yahoo! Answers India
http://in.answers.yahoo.com/question/index?qid=20100805043252AAP5B3j Competition: low
Need any more reasons? Source(s): Naval Aviator 3 years ago Report Abuse 2 people rated this as good by ? Member since: 07 June 2010 Total points: 2,323 (Level 3) Add Contact Block They have to fly in the stratosphere because the air is thinner, and it gets a lot better fuel efficiency because of the reduced drag
Why are jet engines more fuel efficient at high altitude? - PPRuNe Forums
http://www.pprune.org/tech-log/10655-why-jet-engines-more-fuel-efficient-high-altitude.html Competition: low
The work done in compressing the gas is recovered as the piston moves back down the cylinder under the pressure of the compressed gas (less friction losses etc.) If the piston compresses the gas to half its original volume, then it has a compression ratio of 2:1, as the piston recovers it can do work based on the compression it started with. All this can be proved mathematically from first principles through the laws of thermodynamics, a branch of Physics usually studied at second year degree level in Mechanical Engineering
How does the atmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level? - Yahoo! Answers
http://answers.yahoo.com/question/index?qid=20080604093531AAeojf2 Competition: low
A 3.1-L sample of hydrogen at the same temperature and pressure? has the same mass contains the same number of atoms has a higher density contains the same number of molecules If the atmospheric pressure on Mt. Other Answers (1) by Shaun W Member since: December 28, 2006 Total points: 245 (Level 1) Add Contact Block The link below is to noaa and can be used to calculate the pressure at any elevation
http://www.altitude.org/why_less_oxygen.php Competition: low
The problem is that there are fewer molecules of everything present, including oxygen.So although the percentage of oxygen in the atmosphere is the same, the thinner air means there is less oxygen to breathe.Try using our barometric pressure calculator to see how air pressure changes at high altitudes. As you go up a mountain, the air becomes less compressed and is therefore thinner.The important effect of this decrease in pressure is this: in a given volume of air, there are fewer molecules present
Why is it colder at high altitudes?
http://io9.com/5550672/why-is-it-colder-at-high-altitudes Competition: low
Rough, unpredictable, they're likely to bounce off each other, and run riot through the streets, and go to nightclubs with guns stuck in the waistbands of their jean shorts. They have more space to wander around in, and because they don't bounce off each other as much, because they're not crammed into a small space by the pressure of the air above them, each square inch has a much lower temperature than sea level air
http://www.pbs.org/wgbh/nova/everest/exposure/pressure.html Competition: low
Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling on air, and this pull, or "pressure" of air, is called atmospheric pressure. In fact, meteorologists monitor atmospheric pressure at the Earth's surface in order to determine whether the pressure is rising or falling, which helps to predict weather patterns
Why is it Difficult to breathe when high altitude
http://wiki.answers.com/Q/Why_is_it_Difficult_to_breathe_when_high_altitude Competition: low
Therefore, doing physical activities at high altitude, where your body demands a lot of oxygen to function can be very difficult because you need more breaths to get the same amount of oxygen as you would at sea level. In other words, if you have a container of air at sea level, that container would hold more molecules than the same container would have at higher elevation
Pressure Variation with Altitude in Earth's Atmosphere - Windows to the Universe
http://www.windows2universe.org/earth/Atmosphere/pressure_vs_altitude.html Competition: low
RSS Feeds Science Blogs Perspectives on Earth and Space Science Education Real Climate: climate science from climate scientists EPA Greenversations Global Learning and Observations to Benefit the Environment Citizen Science Buzz Atmospheric pressure drops as you go higher up in the atmosphere. That's why mountain climbers sometimes need bottled oxygen to breathe, and why it is so easy to get 'winded' while hiking in high mountains or even visiting someplace at elevation
why water boils at a lower temperature at higher altitudes.
http://askville.amazon.com/water-boils-lower-temperature-higher-altitudes/AnswerViewer.do?requestId=68278432 Competition: low
The proverbial 3 minute egg would still be nearly raw at high altitude, because the water would boil at a relatively warm temperature! Hydroace 41 months ago Please sign in to give a compliment. Pressure cookers are able to cook food faster, because they allow food to boil at temperaturs above 212 deg farenheit (or 100 celcius) by pressurizing the food as it cooks
Why does air pressure decrease with an increase in altitude
http://wiki.answers.com/Q/Why_does_air_pressure_decrease_with_an_increase_in_altitude Competition: low
Last edit by EldestSon18 Answer History Related Answers: Why does air pressure decrease with an increase in altitude? The higher you are, the less air there is above weighing down uponyou.This has to do with the fact t Does air pressure decrease with increasing altitudes? yes Why air pressure decreases with increasing altitude? Air, like everything on earth is subject to gravity - air pressure decreases at higher altitudes bec Does air pressure decrease at a constant rate with increased altitude? No, decreasing rate What does air pressure do when altitude increases? Air pressure decreases with increase of height
http://www.npl.co.uk/reference/faqs/why-does-atmospheric-pressure-change-with-altitude-(faq-pressure) Competition: low
The gravitational attraction(*) between the earth and air molecules is greater for those molecules nearer to earth than those further away - they have more weight - dragging them closer together and increasing the pressure (force per unit area) between them. Molecules further away from the earth have less weight (because gravitational attraction is less) but they are also 'standing' on the molecules below them, causing compression
Atmospheric pressure - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Atmospheric_pressure Competition: low
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1050.0 mbar (105.00 kPa, 30.01 inHg), with record highs close to 1085.0 mbar (108.50 kPa, 32.04 inHg)
Effects of Pressure and Density Altitude on Aircraft Performance
For example, aircraft all up weight is something we can do about but air density depends on more factors, as we will see, and most of them we can not influence at all. International Standard Atmosphere A standard atmosphere has been established to enable comparison of aircraft performance, calibration of instruments (altimeters, transponders encoders, etc) and for meteorological purposes
ABC of oxygen: Oxygen at high altitude
This is because the decreased driving pressure for oxygen from alveolar gas into arterial blood is insufficient to fully oxygenate the blood as it passes through the pulmonary capillaries. The cause of acute mountain sickness is not understood but is clearly related to hypoxia and factors such as effort, air temperature, previous viral respiratory tract infection, and innate susceptibility
Barometric pressure sensor - Ford Diesel Power Forums
Also need to know if the Computer a DAC3 has a sensor in it and if so how do I disconnect the stand a lone sensor and short it so that the internal one is working properly. I need to know at what voltage should the bps be at at 500 feet above sea level, should it be in the negative or positive range of 12 volt dc I need to know if the DAC3 model computer has a built in bps and if so how do I disable the stand alone bps that this truck originally came with
Obviously there are limits to how high and fast a particular aeroplane can go due to mach number (shockwave) effects or simply that the engine thrust becomes insufficient. The solution to the conflict is to fly high since this enables the airframe to fly at an optimum speed (EAS) whilst the engine is flying at high speed (TAS)
Droughts slowly dry up the regions they affect and can last for years, making them one of top three threats to the human population (along with flooding and famine). This information is then fed into computer programs called Numerical Weather Prediction (NWP) Models which are a vital part in how weather forecasts are made
His barometer used a glass tube from which all air has been removed (a vacuum) and is inserted into a container of mercury that is exposed to the pressure of the air. This is probably due to the fact that the pressure of water is so much greater in deeper waters making the air pressure above it no longer having any significance
High Altitude Canning
If you're using a pressure canner with a deadweight guage, the kind that shows 5-10-15 psig, increase the pressure to the 15 psig setting if you are more than 1000 feet above sea level. To adjust recipes for high altitude canning, start with these two basic concepts: For boiling water bath canning, add processing time at high altitudes
Why does altitude affect air temperature? - Curiosity
But why on Earth does it have to be so cold up there? We all know that the higher you go, the colder it gets, but why? Altitude affects the temperature of the air because air pressure gets lower as the altitude increases. Finally, just for comparison's sake, if you think we're taking a crushing blow walking around at sea level under that 14.7 pounds per square inches of pressure, you might enjoy buying a telescope and training it on Venus
On average, the air presses against the body at 14.7 pounds per square inch; air inside the body balances out this force, preventing the body from being crushed under this weight. Discussing pressure and its effects on the body involves considering both direct results of pressure changes and weather variables that result from these changes
Health Effects of High Barometric Pressure Barometric pressure, or atmospheric pressure, is the pressure exerted by the tiny molecules of air present in the atmosphere. How to Find the Barometric Pressure Barometric pressure data are widely available and include both current pressures and historic barometric pressure readings
Atmospheric Pressure
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. published: 01 Nov 2012 views: 1695 author: onlearningcurve rerelease Water Lift Atmospheric Pressure Torricelli Vacuum 10 meter potential Order: Reorder Duration: 2:43 Updated: 09 Aug 2013 This water is held in place with atmospheric pressure pushing on the surrounding pond water
Why do I change certain ingredients for high altitude cooking?
http://askville.amazon.com/change-ingredients-high-altitude-cooking/AnswerViewer.do?requestId=16713704 Competition: lowAnswer from newfietom 3 people found this helpful It's all about the boiling point of water Having lived in Denver, CO, I've lived through high-altitude baking and there's nothing more frustrating than adjusting a recipe (baking) that you've known all your life only to end up with poor results anyway.... And if I remember my high school chemistry, then you are correct, that the less the air pressure, then the faster ( and lower the temp ) that will make water boil
Photographer unknown.When converting atmospheric pressure to mean sea level (in order to have homogeneous readings regardless of elevation) a formula is used to calculate such. and European high-pressure records see The Highest of the Highs: Extremes of Barometric Pressure in the British Isles by Stephen Burt, Weather magazine Vol
Therefore it requires a lower temperature for water to boil at a higher altitude, and thus less time (not more), assuming that the amount of heat being used is the same as at sea level. Temperature sometimes increases with height from the surface upward a ways when a temperature inversion exists (resulting from cooling of the surface more rapidly than cooling of air above, as can happen on many nights)
atmospheric pressure - definition of atmospheric pressure by the Free Online Dictionary, Thesaurus and Encyclopedia.
At sea level the atmospheric pressure is approximately 1 kilogram per square centimeter (14.7 pounds per square inch), which will cause a column of mercury in a mercury barometer to rise 760 millimeters (30.4 inches). Also called barometric pressure.A Closer Look The weight of the air mass, or atmosphere, that envelopes Earth exerts pressure on all points of the planet's surface
Since you are breathing fewer molecules of oxygen, you need to breathe faster to bring the few molecules there are into your lungs to make up for the deficit. Do you think a decrease in temperature could be explained in terms of air pressure? How? Air Pressure Experiments 1.While holding your hand on your ribs, take a deep breath and observe what happens to your chest
Altitude - Wikipedia, the free encyclopedia
Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance (feet or metres) instead of atmospheric pressure
And, just as the creatures living at the bottom of the ocean are subjected to the pressure exerted on them by the water, we are subjected to the pressure exerted on us by the atmosphere. How much would the air in this tall, skinny column weigh? Remember the water in the tank above? Each square inch of bottom surface has to support the water above it
Why do airplanes fly in high altitudes even when the oxygen level there is less? - Yahoo! Answers India
Need any more reasons? Source(s): Naval Aviator 3 years ago Report Abuse 2 people rated this as good by ? Member since: 07 June 2010 Total points: 2,323 (Level 3) Add Contact Block They have to fly in the stratosphere because the air is thinner, and it gets a lot better fuel efficiency because of the reduced drag
Why are jet engines more fuel efficient at high altitude? - PPRuNe Forums
The work done in compressing the gas is recovered as the piston moves back down the cylinder under the pressure of the compressed gas (less friction losses etc.) If the piston compresses the gas to half its original volume, then it has a compression ratio of 2:1, as the piston recovers it can do work based on the compression it started with. All this can be proved mathematically from first principles through the laws of thermodynamics, a branch of Physics usually studied at second year degree level in Mechanical Engineering
How does the atmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level? - Yahoo! Answers
A 3.1-L sample of hydrogen at the same temperature and pressure? has the same mass contains the same number of atoms has a higher density contains the same number of molecules If the atmospheric pressure on Mt. Other Answers (1) by Shaun W Member since: December 28, 2006 Total points: 245 (Level 1) Add Contact Block The link below is to noaa and can be used to calculate the pressure at any elevation
The problem is that there are fewer molecules of everything present, including oxygen.So although the percentage of oxygen in the atmosphere is the same, the thinner air means there is less oxygen to breathe.Try using our barometric pressure calculator to see how air pressure changes at high altitudes. As you go up a mountain, the air becomes less compressed and is therefore thinner.The important effect of this decrease in pressure is this: in a given volume of air, there are fewer molecules present
Why is it colder at high altitudes?
Rough, unpredictable, they're likely to bounce off each other, and run riot through the streets, and go to nightclubs with guns stuck in the waistbands of their jean shorts. They have more space to wander around in, and because they don't bounce off each other as much, because they're not crammed into a small space by the pressure of the air above them, each square inch has a much lower temperature than sea level air
Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling on air, and this pull, or "pressure" of air, is called atmospheric pressure. In fact, meteorologists monitor atmospheric pressure at the Earth's surface in order to determine whether the pressure is rising or falling, which helps to predict weather patterns
Why is it Difficult to breathe when high altitude
Therefore, doing physical activities at high altitude, where your body demands a lot of oxygen to function can be very difficult because you need more breaths to get the same amount of oxygen as you would at sea level. In other words, if you have a container of air at sea level, that container would hold more molecules than the same container would have at higher elevation
Pressure Variation with Altitude in Earth's Atmosphere - Windows to the Universe
RSS Feeds Science Blogs Perspectives on Earth and Space Science Education Real Climate: climate science from climate scientists EPA Greenversations Global Learning and Observations to Benefit the Environment Citizen Science Buzz Atmospheric pressure drops as you go higher up in the atmosphere. That's why mountain climbers sometimes need bottled oxygen to breathe, and why it is so easy to get 'winded' while hiking in high mountains or even visiting someplace at elevation
why water boils at a lower temperature at higher altitudes.
http://askville.amazon.com/water-boils-lower-temperature-higher-altitudes/AnswerViewer.do?requestId=68278432 Competition: lowThe proverbial 3 minute egg would still be nearly raw at high altitude, because the water would boil at a relatively warm temperature! Hydroace 41 months ago Please sign in to give a compliment. Pressure cookers are able to cook food faster, because they allow food to boil at temperaturs above 212 deg farenheit (or 100 celcius) by pressurizing the food as it cooks
Why does air pressure decrease with an increase in altitude
Last edit by EldestSon18 Answer History Related Answers: Why does air pressure decrease with an increase in altitude? The higher you are, the less air there is above weighing down uponyou.This has to do with the fact t Does air pressure decrease with increasing altitudes? yes Why air pressure decreases with increasing altitude? Air, like everything on earth is subject to gravity - air pressure decreases at higher altitudes bec Does air pressure decrease at a constant rate with increased altitude? No, decreasing rate What does air pressure do when altitude increases? Air pressure decreases with increase of height
The gravitational attraction(*) between the earth and air molecules is greater for those molecules nearer to earth than those further away - they have more weight - dragging them closer together and increasing the pressure (force per unit area) between them. Molecules further away from the earth have less weight (because gravitational attraction is less) but they are also 'standing' on the molecules below them, causing compression
Atmospheric pressure - Wikipedia, the free encyclopedia
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1050.0 mbar (105.00 kPa, 30.01 inHg), with record highs close to 1085.0 mbar (108.50 kPa, 32.04 inHg)
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